libc/sysdeps/linux/riscv64/bits/uClibc_page.h

   1 /*  Copyright (C) 2004     Erik Andersen
   2  *
   3  *  This library is free software; you can redistribute it and/or
   4  *  modify it under the terms of the GNU Lesser General Public
   5  *  License as published by the Free Software Foundation; either
   6  *  version 2.1 of the License, or (at your option) any later version.
   7  *
   8  *  The GNU C Library is distributed in the hope that it will be useful,
   9  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  *  Lesser General Public License for more details.
  12  *
  13  *  You should have received a copy of the GNU Lesser General Public
  14  *  License along with the GNU C Library; see the file COPYING.LIB.  If
  15  *  not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /* Supply an architecture specific value for PAGE_SIZE and friends.  */
  19
  20 #ifndef _UCLIBC_PAGE_H
  21 #define _UCLIBC_PAGE_H
  22
  23 /* PAGE_SHIFT determines the page size -- in this case 4096 */
  24 #define PAGE_SHIFT      13
  25 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  26 #define PAGE_MASK       (~(PAGE_SIZE-1))
  27
  28 /* Some architectures always use 12 as page shift for mmap2() eventhough the
  29  * real PAGE_SHIFT != 12.  Other architectures use the same value as
  30  * PAGE_SHIFT...
  31  */
  32 #define MMAP2_PAGE_SHIFT PAGE_SHIFT
  33
  34 #endif /* _UCLIBC_PAGE_H */